SIMBAD references

2009AJ....138.1455B - Astron. J., 138, 1455-1464 (2009/November-0)

A new color-magnitude diagram for 47 Tucanae: a statistical analysis.


Abstract (from CDS):

We present a statistical analysis of color-magnitude diagrams of 47 Tuc derived from original and archival BVI photometry that produces the most probable locus for single stars. After adopting E(B-V) = 0.04, we derive an apparent distance modulus (m - M)V= 13.375 and achieve good matches to the most probable locus in the [B - V, V], [V - I, I], and [B - I, I] planes with 12 Gyr, [α/Fe] = +0.3, [Fe/H] = -0.83 isochrones from the Victoria-Regina models. This metallicity is generally lower than recent spectroscopically derived estimates for the cluster, but it is reinforced by the main-sequence match with a sample of subdwarfs.

Abstract Copyright:

Journal keyword(s): globular clusters: general - globular clusters: individual: 47 Tuc

Simbad objects: 57

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